The Grenada gazette. (Grenada, Miss.) 1885-18??, 1887-07-09
HEAT IN c,RcvLAR s....


@o-AR SAVE
A.sAaaisal ssAjs.. lAss'ssA
The tendency to heat !.
saws is the greatest difacul., ',fe.ls
management. Wherever th,r. N ast
friction experienced in oue. IN Is mud
hot and expand. and in thst Nv s'i gu
times. indeed. It will buckle ~.a some
become materially injured '"u 'ae'
heating Of . saw be a tsndsae, !, = u.
the side Of the saw wh,eI @caR
most by heat becomes cow, sApaads
run too long 1t will not r.,,.., 'aa I
former shape when cooled, but IN 70 ~
quirs h~ammering on IL. ll n
straighten It This is a lob ~, sass \
quires considerable skill. and. h.., y
few who use such saws have . .sslas
anvils to straighten them NM. A
such the following will n /. =
information: Prepare .n h..
number Of annular papers ~
their inside diameter about ON. "a, sa
less than that Of the hub, and i ,.a
them ON the shaft adjoining d. t 80
cave side Of the saw. Preusrs , J.. W.
similar papers with their inside a;."'
ter equal to that Of the h.la !.
center Of the saw, and their ANITA
diameter about one inch create, =,
place these on the saw shaft .d;o;,;.
the convex side Of the saw. ImS
Gent number Of these being 90 ul,0.l
in, they are frightened up in the IVY
and the saw is brought up true in 4.
face. Care must be taken to but in :.
more papers than will strsiehten i.
saw. It is not, however, absoluts,
necessary to take the cup out Of a "a.
until il becomes Of a considerable IL.
for a saw will do good work even VIII,
cupped a quarter Of an inch; the h,
creased difficulty, however, Of man,,.
ing it in this condition renders Il i.
visible not to work it in such a stat.
In working cupped saws the teeth
should be made to fill a wider gsu,,
on the convex than on the concas,
side; and If the tendency to heat attn.
center continues, it should have mo,.
rake. is cupped towards it, The teeth
Of a cupped saw IN ascending. in All
likelihood, will scratch either the ta,
Of the log or the plank. which is
sufficient reason to at once straightep
by such a pressure; they tend to stretch
the saw at the point where it passes
between them. but the edge Of the saw
is often stretched by cumming ma.
chimes. 1t is seldom necessary to
s::raighten a buckled saw on an anvil
especially If only a narrow ring near
the edge Of the saw is stretched, as ID
may be remedied by cutting through
it, either by drilling a hole at the end
of each tooth, or fling toward the ceu.|
ter Of the saw until the stretched psr|
Is cut through.
Water Is sometimes used to cool \
saw; it enables the saw to work in d
smaller kerr, thus saving power; and
it also acts as a partial lubricstor. ID
should be directed in Jets on each sids|
Of the saw near the center. Its us,
however, should be avoided in cold
freezing weather. Allowing the saw
shaft to play endwise is one Of h.|
most effectual means Of keeping The
saw cool. When the timber SPRING
against the saw. tending to heat it III
the center, the end play Of the shaft
allows the center Of tho saw to yield;
at the same time the guide pins at ito
periphery keep it in line, and the frie
ton is thereby reduced and liability b
heat diminished in corr ~esponding de-
cree.-AnNricdn Cabinet Maker.